JEE Physics Practice Question
A heavy nucleus $Q$ of half-life 20 minutes undergoes alpha-decay with probability of $60 \%$ and beta-decay with probability of $40 \%$. Initially, the number of $Q$ nuclei is 1000. The number of alpha-decays of $Q$ in the first one hour is
- A.50
- B.75
- C.350
- D.525
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